Electric regulation.



Patented May 7, 1912.

J. L. CRVELING.-

ELECTRIC REGULATION.

APPLICATION FILED 00T. 11, 1910. 1 .025,455.

7 UNITED STATES PATENT OFFICE.

JOHN L.

OEEVELING, or NEW YORK, N. Y., ASSIGNOE. To SAFETY can HEATING AND LIGHTING comm, A CORPORATION OE NEW JERSEY.

ELECTRIC BEGULATION.

suman of tetten ramt. i Application md october 11, 1910. serial No. seams.

I10 elect-ric regulation wherein it is desired to automatically regulate an electric circuit in response to changes tending to take place within said circuit.

My invention has for its particular4 object to provide means whereby the current in a circuit or the voltage across a circuit may be automatically governed in a predeter.

mined manner throughout wide variations or changes at the source from which the circuit is fed, or throughout wide variations or changes of load upon the circuit.

As my invention is particularly applicable to av system wherein a dynamo or generator running at variable speed is employed to charge a storage batter and operate lamps, or other devlces, itpwlll be'described with reference to such a system.

The drawing is a diagrammatic representation of one .type of such system embodying the essentials of my invention.

In the drawing, 1 represents a dynamo or generator, the positive brush of which is connected with the lead 2, which is in communication with .the ositive side of the storage battery 3, and amps orftranslatingY l end ot the carbon pile 7, from the other end of which the wire 8 is carried to the main 9, having in series vtherewith the hand operated.y switch 10, and terminating in one terminal of the automatic switch 11 the opposite terminal of which is connected to the generator as by lead 12. The negative side of the storage battery 3 is connected preferably between the switch 11 and switch 10 as shown. Wire 13 is carried to one end of the carbon pile 14, the opposite end of which is connected as by wire 15 with the main 9. The automatic switch 11 may be of any of Athe well-known types of automatic switches adapted "to connect the generator to the storage battery when the voltage of the genera- A Patented May 7, 1912.

toris Asubstantially equal to that of the battery. and to disconnect the generator when its voltage falls below that of the battery. As these switchesA are well-known in the art, the one indicated in this drawing is shown as provided merely with the actuat-.

ing coil 16 for the sake of simplicity. The

lever 17, normally drawn in a: ,downward direction by adjustable spring 18,'tends to compress lthe carbon pile 7 and reduce the resistance thereof.

. 19 represents a core of iron ory other ma netic material which the solenoid 20 ten s to draw in an upward direction when energized. The solenoid 20 is connected across .the circuit to be governed vas by means of wires 21 and 22.

23 is a dashpot which may be used if 'desired to prevent too sudden motion ofthe lever 17. The lever 24 is normally ,drawnl in. 'an upward direction b y the adjustable spring 25 which tends to essen the pressure upon the carbon pile 14 and increase the resistance thereof. The motion in an u ward direction which may be given to t e lever 24 by the spring 25 may be limited as by the adjustable yscrew 26.

27 is a core of iron or Aother magnetic ma terial carried by the lever 24, so arranged that the solenoid 28 when energized tends to draw the core 27 downward, and thus by swinging the lever 24 increase the pressure upon the carbon pile`14, and reduce the -resistance thereof. The solenoid 28 is preferably of ine wire connected across the switches 10 and 11, as indicated by wires 29 and 30.

The operation of my invention is substantially as follows r--If the generator be at rest, the switch 11 will be operi' as shown in the drawing, and if the switch 10 be closed, current will iiow from the storage battery 3 through lead 2, translating devices 4, main 5, wires 6 and 13, carbon piles 7 and 14 andI lated. Current will also .tlowf from the across the translation circuit to be governed.

I now adjust the spring 25 so that the solenoid 28 will draw the core 27 downwardly and compress the carbon pile 14 and reduce the resistance thereof as much as desired. I

usually prefer to reduce this resistance to a small quantity under the above conditions when the battery alone is supplying the translating devices.A I now adjust the spring 18 so that the resistance 7 which controls the voltage across the solenoid 20 will be such as to produce the no-rmal voltage upon the translation circuit. If now the generator be started, its voltage will rise and this being opposed tothe voltage of the battery, will decrease the current passing irom the battery through the generator and throughthe coil 28; this will lessen the pull upon the core 27 and allow the resistance 14 to be increased, throwing more of the load4 upon the resistance 7. W'hen the voltage of the generator is suiiicient to cause the swiuih 11 to close, there will be practically no current in vthe coil 28, and 14 will haveits maximum resistance. If the speed of the generator new increase so that the same is supplying current to the translation circuit, he voltage across the saine will tend to rise,

and thus cause the coil 2O to exert a stronger ,pull upon coil 19 vcrease,resistance 7 and hold-the voltage upon in such a manner as to injtlie translating devices constant; It the y generator speed be suiiicient'to chargev the 4).l'lii.

slows down 'still turther, its voltage-'will ery, a further rise in voltage will take r,which will `in like manner be comr: rv by the resistance 7. It now the generatcrslow down, so as to cause the voltage across the translation circuit to fall slightly, the ccd2() will allowspring '18 to f fr'fipress the earbon'pile 7 and reduce the resistance thereof in a well-known 'manner to compensate itor such increase and hold the' voltage on vthe translation circuit .substantially constant. It now the generatorfspeed fall to where its'voltage equalto that Yof'y the battery, any further decrease willgradually Ishirt the load from the 'generatori to the battery and then open the switclilll.;

'lhe ,load now being carried by thebattery will tend to bring its voltagedown 'quitequjicltly to the normal and it will thus be red to reduce the resistance in thetranscirc'. t to an amount less thanithe iiinum stance of 7. As the generator drop below that of the batteryand the current flowing in the coil 28y lwill increase. This will tend to increase the pressure upon @the carbon pile 14 as `,above set vkforth,v and reduce the resistance in the translation 'ein cuit by the carbon pile 7 It now ,tern

the Vgenerator shall stop, thevcoil 2Q will e of the carbon pile 7, nnless :the voltage 7 Aacross the translation circuitshall be above the normal, when the carbon pile 7 will have its resistance increasedby solenoid 20 and tend torholdthe normal voltage constant.

I do notV wish in any way to'limit myself to the exact details of construction or mode oli operation set/forth herein, as I have merely shown a diagrammatic representation of one type of systemembodying my '80 invention7 and it is obvious that wide/departure in the way ofdetails may be made without departing froml the spirit and scope of the said invention, which is set forth in the following claims- 1. In a system of electrical distribution comprehending a generator, storage battery and translation circuit, means for regulating the translation circuit comprehending circuit regulating means, means for governing the same, circuit regulating means coperating therewith inthe regulation ofthe translating circuit and means tor controlling the same operatedv by current {lowing back from thebattery through vthe vgenerator.

2. In a system of electrical distribution comprehending aogenerator, a storage batv a translation circuit and a switch between t-he generator and the battery, means for-'regulating' the translation 'circuit and means foroperating the' same responsive to diverences of potentiall across 'said switch.

' 3'. The combination with'a supply circuitff a switchcontrolling the same, a storage battery in operative relation to said supply circuit, a Abattery circuit anda translation circuit,of means torcontrolling the translavtionen-cuit comprehending regulating means responsive t'o iiuctuations in the translationv 110' v 'circuit' and regulating means coperatingv therewith affected by fluctuations across said switch.'

4. `In la system of electrical distribution -compreliending a generator, a storage battery, a' translation circuit and a switch in the generator circuit, means for, regulating the translation circuit o'inprehending a regulating element and meansfor operating the same' responsive to -fluctuations inthe traus- 120 lation circuit, a regulating element lcoperating therewith and `means for operatingfthe 'same-'responsive to differences in potential ybetween the generator circuit and the battery circuit.

In a system o coiiiprehendiiig if tery', a traiislatio tl i'e f generator circui the. translation cir i, ical distribution ,a storage bataid afswitch I in sffor. regulating A oinprehending a 130 regulating element and means for operating the same responsive to, fluctuations in the the translation circuit compl-ebending a translation circuit. a reeulatinT element ctra and means tor operatregulating element and means t'or operating the saine responsit'e to fluctuations in tlie translation circuit` a regulating' 'element'. co-

and means for operating tlie ,same comprebendingv a coll-ati'ected by the operation ot' Y. said switch.

Washington, D. C.

compi-ebendingr operating' therewith to regulate said circuit l t t tbe lsame responsive to fluctuations in tbe translation circuit. a reguilating;` element eooperating tlieren'itli and means for operatmer the .saure couiprehendingzj a coil con' neeted to tlre generator circuit and the batteryv circuit.

S. In a .sjstem of electrical distribution comprehemline' z `generator, a storage battery. a translation circuit and a switch between the generator and the battery, means t'or regulating tlie translation circuit, affected by a coil connected across said switch.

E). 1n a system of electrical distribution a generator, u storage battery` a translation circuit, and av snitcli between the generator and tlie storage battery, a coil in shunt thereto and means for regulating.;i the translation circuit' affected by said coil. i

Witnesses:

Citas. MCC. CHAPMAN, A. E. Trinite.

addressing the Commissioner of Pttst 

